By: Emily Stranford and Jamie Cameron
A chemical substance that alters perceptions and mood (effects consciousness).
Drugs that excite neural activity and speed up body functions.
Drugs that reduce neural activity and slow body functions (they include alcohol and barbiturates).
Can be classified as a type of depressant because they are drugs that reduce neural activity and slow body functions (example- morphine and heroine).
Any "mind-expanding" that is able to induce states of altered perception and thought.
With repeated exposure to a drug, the drug's effect lessens. Thus it takes greater quantities to get the desired effect.
Upon stopping use of a drug (after addiction), users may experience the undesirable effects of withdraw.
A craving for a chemical substance, despite its adverse consequences (physical and psychological).
Absence of a drug may lead to a physical pain, intense cravings (physical dependence), and negative emotions (psychological dependence).
Overview of psychoactive drugs
About 200 million people worldwide are using opiates.
Not all psychoactive drugs are illegal.
Caffeine is considered a psychoactive drug.